Machine for inserting fastenings.



' @MALL ,Z476 I,

L. AVCASGRAIN.

MACHINE PoR INSBRTING FASTBNINGS'.

APPLICATION FILED NOV. 22, 1910. 1,1 15,503. Patented N0v.3,1914.

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L. A. GASGRAIN. MACHINE FOR INSERTING FASTENINGS.

, APPLICATION PILEDrNOV. 22, 1910. 1, 1 1 5,503.

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JERSEY.`

T0 all whom itmay concern: y

Be it known that I, Louis A. CAsGnAiN, a citizen of the vUnited States, residing at Beverly, in the county of Essex andrv State Aof Massachusetts, have invented certain lmprovements in Machines for. Inserting lastenings, of which the. following descriptlon,

yin connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

kThis invention relates to machines for inserting fastenings, particularly to machines for inserting screw-threaded fastenings, and is herein shown as embodied in a screw inserting machine of well-known type which is employed extensively for inserting screwthreaded wire into thesoles of boots and shoes. It will be understood, howeyer, that in its broader aspects the `invention is .not

merely an improvement in machines vof this type.

In its presentcommercial form the illustrated type of machine for inserting screwthreaded wire comprises a kvertical wire carrying spindle, arranged to rotate normally at compartively high speed, and two hori- Zontal lateral shafts driven from said spindle, at comparatively low speed, by means of connections with the spindle comprisingk worm gears upon said shafts which engage a worm upon the spindle. One of the lateral shafts carries the cams through which the wire feeding, wire severing,pwork feeding and horn depressing mechanisms are operated. s

in the machine as at present constructed the spindle and the lateral shafts are maintained continuously in operation, together with the cams and mechanisms hereinabove enumerated, with the exception of the wire feeding mechanism which is rendered' inoperative to stop the insertion of fastenings by holding it out of operative relation to its continuously rotating cam. It has found in practice that some disadvantages result from the present construction, in that the wire severing cutters become dulled by striking together when they are not operating to sever the wire, and that the various cams become worn by continuous use, a large part of which use takes place when the machine is not operating to insert fastenmgs.

Specicatiion of Letters Patent.

been

4 Louis A. cAsenAIN, or :EvEiaizg iviAssAciiUsETTa Assieivon To V,Uiv'iTEii sHoE MACHINERY COMPANY, 0E PATEEson, `nsw JERSEY, A`-.ooRroiz.ATioN or NEW.y

i MACHINE FOR INSERTING EASTENINGS.

The-prior Patent No. 691,354, grantedr January 2l, 1902, discloses a construction in vwhich it has been attempted to overcome the erating to insert fastenings. Although the mechanismk shown in my priorpatent above referred to accomplishes Afor the most,;part the objects which it was intended to accomplish, this mechanism is ytoo complicated in Patented. Nov. 3, 1914:. Application filed November 22, 1910.y Serial'1lo..593,667.

its constructionand not positive'enough in i its operation to be entirely satisfactory.

An objectof the present invention is to" provide a simple and compact construction which will not only accomplish all that was intended to be "accomplished by the 'prior construction, but which can be easily applied to machines in commercial use, and,

which will contributeboth to the life" of the machine and to the ease of operation of the machine by theoperator. To this end the invention contemplates the' provision of means for throwing out of operation, at the time the insertion offfastenings is stopped, all ofthe parts of the machinewhich do` not by lpreventingy unnecessary wear yof these parts, said means being, moreover, so 'constructe'dthat it stops saidparts in such relationto eachother that when theinsertion of fastenings is resumed they will perform their completefunctions for the first fastening inserting operation.

erating the commercial form of machinefor inserting screw-threaded wire is that of conneed to acquire considerable,speedandIHO- c mentum before they become operative, therel One Vof the difficulties encountered in optrolling the length of the initial fastening."r`

Since the only part of the machine which is thrown out of operation when the insertion of fastenings is stopped is the wire feeding mechanism, which is simply'held out of operative relation to its cam, difiiculty 'isencountered in so timing the parts which restore the wire feeding' mechanism to the control of its cam that the length of wire fedintoposition to form the first fastening will be that required by the thickness of the work gaged.` This results from the fact that the *portion of the caml which effects the -ioo movement of the Wire feeding mechanism in the Wire feeding direction may have partly passed its point of operation upon the Wire feeding mechanism when the vvire feeding mechanism is brought into operative relation to its cam. lf the thickness of the Work gaged, therefore, requires a length of wire greater than that which can be provided by the stroke impartedto the Wire feeding mechanism by the part of the cam which has not passed the point of operation at the time the Wire feeding mechanism is brought into operative relation to its cam, the first fastening inserted will be too short.

An important object of the invention is to obviate this difficulty and to this end the various mechanisms,y as above suggested, are stopped in a predetermined operative relation to each other and also in such position with respect to the functions which they are to perform that when the insertion of fastenings is resumed a full length stroke may be imparted to the Wire feeding mechanism, if required, in feeding the Wire into position to form the first fastening to be inserted.

Other objects and features of the inveir tion Will become apparent when the following description and claims are vconsidered in connection with the accompanying dra'vvings, in Which,-

Figure 1 is a side elevation of a machine for inserting screw-threaded \vire,having embodied therein the present invention; Fig. 2 is a perspective detail of the clutches by which the lateral shafts are connected to and disconnected from the normally rotaty ing spindle; Fig. 3 is a longitudinal section through one ofthe clutches; Fig. 4 is an eX- ploded vieiv of one of the clutches, parts being shown in section; Fig. 5 is a perspective view of the means for raising the horn into Work supporting position as the machine is started; F ig. 6 is a detail vievv showing the means for stopping ,the cam shaft inthe eventthat its momentum tends to keep it rotating when it has been disconnected from the spindle; Fig. 7 is a det-ail section shoiving an improved wire check, and Fig. 8 is a `detail perspective of the Wire check.

The. machine to which the invention is shownk as applied is of a Well-known type, the illustrated machine being knoivn to the tradeA as the rapid standard screw machine. rIliis machine, in substantially its present commeicial form, is disclosed in United States Letters Patent 490,622, granted Jan. Q4, 1893, to Louis God-.du and to this patent reference may be had for a more detailed description of parts herein illustrated but not fully described.

The machine is constructed to insert screw-threaded Wire into stock supported upon a horn 2, the Wire being carried by a reel l mounted in a normally rotating spin dle 6 arranged to turn about a vertical axis and driven by abelt 8 upon a pulley 10 upon the upper end of said spindle 6, the belt 8 passing over idlers l2 to a driving pulley 14- mounted in the base of the machine and arranged to be clutched to a driven pulley 16 by any suitable clutch mechanismzvvhich may be operated lthrough a Wedge 18 connected to a treadle 20 in the machine base.

` The spindle 6 is provided with a Worm 22 which engages Worm gears 24 and 26 upon lateral shafts 28 and 30 respectively, the shaft 28 being commonly knoivn as the cam shaft, since the various cams by which the feeding and severing, of the Wire and the feeding of the Work arefeifected and .by Which the movement of the Work support is controlled are mounted yupon this. shaft. The shaft 30 is provided to effect a more positive and a more even driving of the shaft 28 and to equalize the pressure upon opposite sides of the spindle 6, the shaft 30 being geared to the shaft 28 lat its rear end, as more fully disclosed in the prior patent above referred to. A cam` 32 formed upon one face of a cam disk 34 upon the shaft 28 controls the feeding of the Wire. The feeding of the vvorkis controlled from a cam groove 36 formed in the other face of the camdisk 34. The depression of the horn to permit the Work to be fed is controlled from a cam groove 38 in a second cam disk 40 upon Vthe shaft 28, andthe operation of the cutters by which the Wire is severed after the end of the Wire is screwed into the Work is controlled by teeth or tappets 42 upon the cam disk 40, the construction vand mode of operation of all of these parts being also more fully illustrated and described in said prior patent.

WV hen the machine is being used to insert fastenings the spindlel 6 is rotated continuously, the machine frame being provided with means for locking the treadle 2O in its clutch actuating position. In the machine shown in the Patent L190,622 above referred to, the lateral shafts 28 and 30 are also rotated continuously and the insertion of fastenings is interrupted by stopping the feeding of thevvvire. .lt has been found in practice, however, that when the parts are thus kept in motion they are subjected to excessive Wear, and, moreover, when the Wire feeding mechanism is actuated to cause the insertion of fastenings to be resumed, the parts which have been held out of operation will usually not come into operative relation to the parts which have been continuously operated at the proper time to provide an initial fastening of the length required by the thickness of the Work gaged between the horn and the foot plate or other Work abutment.

An important object of the invention is to insure a proper timing of the various mechanisms when the insertion of fastenings is started whereby .the initial fastening inserted will be of the length required for the thickness of stock gaged. To this end all of the parts of the machine which 'are operated atI comparatively low speeds are preferably thrown out of operation when the insertion of fastenings is stopped, and are stopped in such predetermined relations tok each other that when they are again rendered 'operative the feeding mechanism may ,have imparted thereto a full length stroke, if required, for the first fastening inserted, and theother mechanisms shall operate in proper time relation to the feeding mechanism- A very convenient means for thusthrowing out of operation the mechanisms above referred to is illustrated in the accompanying drawings and comprises twin clutches which may be actuated simultaneously to connect the lateral shafts 28 and 30 to the spindle 6 or kto disconnect said shafts from said spindle. vThese clutches are so constructed and arranged that the shafts28 and-.30 will be disconnected from the spindle 6 at predetermined angles of their rotation, there being,

in the illustratedv construction, two of these disconnecting positions since the cams upon the shaft 28 are so constructed that they operate twice' for each rotation of the shaft 28. IThe clutches arepreferably so arranged that they serve to clutch` the worm gears 24 and -26 to the shafts 28 and 30 respectively and to unclutch said gears from said shafts, whereby the gears'24 and 26 are ro-v tated continuously from the worm 22 y upon the spindle 6. The construction of these clutches is shown especially in lTigs. 3 and 4 of the drawings, the clutches being identical in construction. except that they are arranged tofoperate upon shafts turning-- in opposite directions. Each clutch comprises a toothed collar 44 clampedl upon the hub 46 ofone of the worm gears 24, 26, by a screw 48, the worm gear being free to turn upon its shaft until the clutchmember 44 1s engaged byy another clutch member 50 having teeth 52 which interlock with the teeth 54 longitudinally of the shaft into clutching engagement with the clutch member is preferably effected automatically, the`illustrated means for effecting such movement comprising a clutch casing 62 arranged to turnupona 'shoulderedportion 64 ofthe l lateral shaft 28 or'80under the action of af spiral spring 66, said spring 66 having `an [offset end 68v which enters a notch'70 iny the casing' 62 `and another offset end 72 which' enters a notch 74 in the hub of a disk76 clamped `between the shoulder 64 of the lateral shaft and` a nut 78 threaded upon the -end of said shaft. The clutch member 50is vprovided with spirally arranged grooves 80 ends of screws 84 threaded into the casing 62. Asthe casing 62 turns relatively tothe '76 i into which project studs 82 formed upon the toothed enlargement of the lateral shaft, the` studs 82 traveling in the slots 80 move y-the` clutch -member-50 shaft.

In order clutch member '50 out `of clutching relation to the clutch member44,fthe clutch casing 62 is held against rotation lwhile the laterallongitudinallyy of said to effect the movement of the` 'se n shaft 28` or 30v continuesr to rotate.` rlhe studs 82 being stationary, th'espiral grooves f 80 turn relatively to these studs and lthus move the .clutch member 50 longitudinallyl of the lateral shaft'out ofengagement with the clutch member 44. y

The operation of the clutches is controlled by lmeans connected witha treadle; 86 fulcrumed at 88 inthe machine base, theillustratedl` means comprising i a levert 90 vful#` crumed at 92 in the machinehead and coni nected by a rod 94 withthe rear end of the treadle 86, the rod 94 being yieldingly held` in its lowermost position by a spring 96 con.`

nected at one end to a bracket98 upon `the machine frame and at its other end to .af bracket 100 clamped upon. the rod 94., At

its forward end the lever 90. is provided with stop portions 102 which lie in the paths los f of rotation of lugs 104 formed upon the casings 62 of the twin clutches whenlthe lever f 90 is in its normal position, thatis when the forward end` of the lever 90 isin its upper- .most position'in whichy it is normally 'main-rv tained by the spring 96.

Each of the clutch casings is provided with two jof the lugs 104, since the worm gears 24 and 26 may be unclutched from the lateral shafts 28 and 30 at eitherof two angles of rotation ofsaid shafts, in, view of the fact that the cams upon'y the 'shafts28' tion of the shaft 28. When the treadlef86x is depressed, the forward end` of the lever 90` is lowered and the stops 102 are moved` out off engagement with the lugs 104 upon the clutch casings 62, thus permitting these casings to be turned under. the action of the springs 66 to move the clutch members 50 longitudinally of thelateralshafts 28 and 30 into clutching relation tothe clutch Lmembers 44, thereby simultaneously connecting the gears24 andk 26 to the shafts28 andBO,

respectively.

iia i `are shaped to operate foreach half rotaice When the machine is operating to insert` fastenings, the horn 2 is maintained nor-r mally in work clampingposition by a comparatively strong spring 106 and is depressed against the tension of said spring .between the successive fastening inserting operations, to permit the feeding ofthe work, by means comprising a lever 108 carrying a cain roll 110 which enters a cam groove 38 in the cam .disk 40, and a pawl carrying slide 112 carryinga pawl 114 which engages a ratchet upon another slide 116, the slide 112 being con nected by a link 118 to the lever 108and the slide 116 being connected `by a rod 120 and toggle 122 and `124 to a lever 126 fulcruined at 128 in thev machine base. The lever 126 is connected at its forward end, by a rod 130, to the horn supporting shaft 132. The spring 106 surrounds the rod 120 and is confined between the machine frame and a collar 134 threaded upon said rod. The work thickness compensating mechanism, comprising the slides 112 and 116, is of well-known construction and is more fully shown and described in the prior patent to Louis Goddu, 383,455 granted May 29, 1888.

1n order to permit a final depression of the horn greater than that provided for the feeding of the work, the toggle 122, 124 has been provided in the connections between the `spring 106 and the horn 2, and means has been provided for straightening the toggle as the machine is rendered operative to insert fastenings and for causing the toggle to be broken as the machine is rendered inoperative. The illustrated means comprises a ylink 136 pivotally connected at one end to an extension of the toggle link 124 below its pivotal connection 138 with the lever 126, said pivotal connection 138 being guided in a slot 140 in a toggle supporting casing 14.2 upon the rod 120. The link 136 is connected at its other end to an arin 143 upon the treadle 86, said link being provided at its end with a slot 144 which provideslost motion when the treadle 86 is released to render the machine inoperative, so that the horn 2 is not lowered until the insertion or fastenings is stopped.

To insure the breaking of the toggle a spring 146 is provided, one end of the spring being connected to the casing 142 and the other end pressing upon the toggle near its knee joint. A pin 148 extending through the casing `142 from one side to the other provides a stop for determining the straight- Y cned position of the toggle.

The o-peration of the machine may be briefly described as follows: The parts being in the position shown in Fig. 1, the operator places a shoe, or other work, upon the horn 2 and then depresses the treadle 86. As

the tieadle 86 is depressed, the link 136 is moved toward the rear, thus straightening the toggle 122, 124 and raising the horn 2 into work clamping position, the spring 106 being placed under tension' at the same time. The depression of the treadle 86 also rocks the lever 90 in a clockwise direction about its pivot 92 (Fig. 1) and moves the stops 102 out of engagement with the lugs 104 upon the clutch casings, 62, thereby permitting the gears 24 and 26 to be clutched to the lateral shafts 28 and 30. The spindle 6 being continuously in motion, the clutching of the gears 24 and 26 tothe lateral shafts 28 and 30 vimparts motion to these shafts and to the cams upon the cam shaft 28, thereby rendering operative the wire feeding, wire severing, work feeding and horn depressing mechanisms. So long as the treadle 86 remains depressed, the machine will insert` a fastening for each half rotation of the shaft 28. Then the treadle 86 is released, the lever 90 will move in a counter-clockwise direction about its pivot 92, thus bringing its stops 102 into the path of movement of the lugs 104 upon the clutch casings 62, whereby" the gears 24 and 26 are simultaneously unclutched from the lateral shafts 28v and 30 and the rotation of these shafts is stopped. The release of the treadle 86 permits the breaking of the toggle 122, 124 which is aided by the action of the spring 146 4and also by the final movement of the arm 143 of the treadle 86 when the pivot upon the arm 143 engages the end of the slot` 144 in the link 136. The breaking of the toggle permits the descent of the horn 2 `into such position that the workcan be easily replaced preparatory to the next fastening inserting operation.

The lateral shafts 28 and 30 are preferably disconnected from the spindle 6 at such times that they will stop just as the wire feeding and `wire severing cams upon the shaft 28 have passed their operative positions and while the horn is depressed to permit the -work to be fed. To prevent the momentum acquired by the cams from carrying them too far beyond the desired stopping position, a check is provided, the illustrated check comprising a yoke 150 pivoted upon the cutter actuating slide 152, this yoke being pressed by a spring 154 normally into the path of the cutter actuating tappet 42 upon the cam dis-k 38, whereby it engages said tappet and checks the rotation of the shaft 28 after it has been disconnected from the spindle 6 in the event that the momentum of the vcams carries them beyond the preferred stopping position, which is approximately that illustrated in Fig. 6. The yoke 150 also checks the tendency of the shaft-28 to turn under the action of the clutch spring 66. 4 y

A. vwire check or wire'brake is shown in Figs. 7 and 8 of the drawings and comprises -f pivots 164igrooved wirev engaging wheels 156 and 158 Vcasing having a wire receiving opening 162 through which the wire passes from the reel. The wheels 156 and 158 engage the wire upon opposite sides and are provided with and 166, respectively, Jwhich yare supported upon springs 168, 170, the springs 168 and 170 pressing the pivots 1611, 166 toward the upper end of converging openings 172 in the sides of the casing 160 whereby the wheels are pressed toward each other and grip the wire tightly between them, this gripping action increasing if the wirek is drawn up through the opening 162. l/Vhen the wire is pulled down through the opening 162 and past the wheels 156 and 158, the springs 168, 170 permit the wheels to be moved downward and thisdownward movement vof the wheels bringsy the pivots 164 and 166 into the wider parts of the openings 172 in the casing 160, thereby permitting the wheels to separate to allow the wire to be drawn freely past them. lt will benoted that this wire check or brake is very simple in construction, as well as eflicient in operation.

If it is desired to lower the horn 2 beyond the position into which it has been brought by done by means of a third treadle 180 having an arm 182 which engages the underside of the lever 126 upon the side ofthe fulcrum 128 remote from that upon which the horn 2 is located.

.The novel clutch herein shown, being a separate invention, has been made the subject-matter of a divisional application Serial No. 7 62,849, filed April 19, 1913.

Having described my invention, what I claim as new and desire to secure by Let* ters 4Patent of the United States is 1. A machine of the class described, coniprising a continuously rotating wire carrying spindle, lateral shafts driven from oppositesides of said spindle, wire feeding means constantly connected to said shafts, and means for simultaneously disconnecting said shafts ,from said spindle while said spindle continues in operation.

2. A machine of the class described, com-` prising a continuously rotating wire carrying spindle, lateral shafts intergeared with,

each other and independently connected with said spindle, wire feeding means constantly connected to said shafts, and means for simultaneously disconnecting said shafts from said spindle while said spindle continues in operation.

3. A machine of the class described, comprising a continuously rotating wire carrying spindle, shafts connected to opposite sides of said spindle and driven therefrom, saidl simultaneously disconnecting said shafts" the breaking of the toggle, this may be shafts being intergeared with each other, wire feeding means constantly connected .to

said shafts, twin "clutches through whichy said shafts may be connected to and disconnected from said spindle, and means for simultaneously operating said clutches.

4. A machine of the class described, comy carrying spindle, horizontal vshafts -inteigeared with eachv other and, having independent worm and lgear connections with said spindle, wire feeding means constantly connected to said shafts, and means for simultaneously unclutching said shafts from`y said worm and gear connections while said spindle continues to rotate.

5. A machinefor inserting screw-threaded fastenings, comprising in combination, a continuously rotating vertical wire carrying spindle, horizontal shafts intergeared with each other and having independent opc erative connections with'said spindle, wire feeding and wire severingy mechanisms -norprisinga continuously rotating vertical wire mally connected with said horizontal shafts,- 4 and means for simultaneously disconnecting said shafts from said spindle Ito stop the feeding and severing of `fastenings while said spindle continues to rotate.

6. A machine yfor inserting k.fastenings, comprising in combination, a continuously rotating vertical wire carrying spindle,"fhori'` zontal shafts intergeared with each'v otherv andl having independent worm and gear corny nections with said spindle, wire feeding and wire severing mechanisms, a clutch between each of said lateral shafts landits worm gear, and means for simultaneously operating said clutches whereby said shafts may be disconnected from said spindle while said spindle and said worm gears continue to rotate.

7. ln a machine of the class described,

wire feeding mechanism, wire severing mechanism, parallel shafts from which said mechanisms are operated, a single driving means arrangedto turn said shafts in oppoT site directions, a clutch upon each of said shafts by which it may be connected to and disconnected from said driving means, each of said clutches comprising clutch control-` ling means arranged to turn with the shaft, and a single means located between the shafts and arranged to be brought into the path of movement of both of said clutch coniis trolling means whereby the connection yof c said shafts to the driving means and thedisizo connection therefrom may be effected simultaneously.

8. A machine of the class described, comprising a continuously rotating wire carry ing spindle, lateral shafts driven from oppo-l` site sides of said spindle, wire feeding mech anis'm, wire cutting mechanism, means forL from said spindle While said spindle conname to this specification in the presence of tinues in operation and when said Shafts are two subscribing Witnesses. in predetermined angular position, and- LOUIS A; CASGRAIN. means for' Checking farther movement of Witnesses: 5 said shafts. IRA C. BUCKMINSTER, In testimony whereof I have signed my ELMER B. GRUSH.

Copies of* this patent may be obtained for iive cents each, by addressing the Commissioner of Patents,

- Washington, D. CJ 

